In apparatus for withdrawing patterns from molds for casting



S. J-. ADAMS.

Apparatus for Withdrawing Pattern from Mold for Casting.

No, 213,964., Patented April 3, 1879p 4f ls sq! gal III M UNITED STATESPATENT OFFICE.

sR'JAuviS ADAMS, or PITTSBURG, PENNSYLVANIA.

llPRflll ilfiflT l N APPARATUS FOR WlTHDR AWlNG PATTERNS FROM MO'LDS FORCASTING.

Specification fdfinilig pal tTifLetters iatenfi N6. 213,964, dated April8, 1879; applicatibii filed January 28, 1879.

.Tp alt whomdtmaymncern:

Be it known that I, S. Jaavrs 'ADAMS, of Pitts'biirg,-in the county ofAllegheny and State of Pennsylvania, haveinvented a new and usefulImprovement in Apparatus for Fprming Molds for Castings; and I do herebydeclare the'followiug to be a full, clear, and

exact deseriptionthereof, reference being bad to the accompanyingdrawings, forming a part of this specification, in. which! 1 is'a faceview illustrating part of my invention;' Figs. 2 and 3 are side views.iFig. 5 is a sectional view through the line a: w, Fi'g. 3. Fig. 5 is aperspective view, showing {one form of apparatus for withdrawing thepattern. Fig. 6 illustrates the method of cutting oil the mold; and Fig.7 is a view of the reservoir bottonrboardz Like letters of referenceindicate like parts in each.

My invention relates to apparatus for forming molds'in sand for makingiron, steel, and

ther metal castings. Heretofore much diffiulty has been experienced atdifierent stages in the formation of these molds, among which thefollowing have been particularly noticed: Wherea reservoir was used informing molds,

either by jarring or pressing, it has been ex-v ceedingly diflicult tocut the sand so as to separate the flask and reservoir evenly, audit hasbeen found necessary to smooth or leveloff, and in some cases to fill inand ram, the mold after the reservoir has been removed.

It has also been found almost impossible to withdraw the pattern fromthe mold by hand without to some slight degree marring the mold, whichwas very objectionable in molds for long cylindrical castings, such aspipeplugs, wagon-boxes, &c., rendering it necessary to. tarp thecastings before .use.

"The object-"of -thy-invention is to overcome these objections, and toimprove the apparatus used for forming molds in other particuars.

It consists, first, in separating the sand of the mold from the extrasand in the reservoir by means of a wire drawn between the the mold, andis provided with suitable lifting mechanism for withdrawing the pattern;third, in a hinged swinging platform adapted to be connected to and usedwith the molding-table; and, finally, in other details of constructionhereinafter specifically set forth.

To enable others skilled in the art to make and use my invention, I willdescribe its construction and operation.

In the drawings, A represents the moldingtable, which may be arranged toform the mold by jarring, as shown, orby pressing, or in any otherconvenient way. The pattern or patterns c are attached to thepattern-plate O, which is placed on the molding-table A, and the flask Bis placed over it, so that the patterns extend up into the flask. Theconnectinglugo of the pattern plate flts into a recess in themolding-table. The reservoir B is then placed on the flask, and the moldformed in the usual way.

D is a separating-wire, which is of small gage, so as to out easily, andis provided at each end with a handle, d, by means of which it isheldwhen usedby the workman. After the mold is formed the wire is placedback of the flask and drawn through between the flask and reservoir, asshown in Figs. 1 and 6, being'operated by the handles (1, thus severingthe sand of the reservoir from that of the mold, so that the reservoirmaybe slid off and leave an even surface to the mold. As the wire isheld taut and is guided in its movement by the edges of the flask, itcuts the surface per fectly true with the flask, and leaves an evensurface on the mold, which needs no leveling off or filling in when thereservoir is removed.

. After the separation of the sand in the reservoir and flask thereservoir is removed by placing the reservoir bottom board E against theflask B (its upper edge fitting under the guiding-strip b on thereservoir and the teeth a pressing into the flask) and sliding thereservoir onto'the board E, as shown in Fig. 2. The guiding-strip I) iseven with the bottom of the reservoir, so that it will slip onto theboard without spilling the sand, and the teeth 0 hold the board in placeduring the operation. Instead o't'thcsc teeth any suitable catch may beused on the board 1'].

When the reservoir is again needed it is W r cy".

slipped from the board E onto the flask in the same manner.

F is a hinged swinging platform, which it is found desirable to useduring part of the operation of forming the mold, and which is hinged tothe floor or frame of the machine in such position as to be swungentirely out of the way when not in use, as shown in Fig. 2. It isprovided with hooks f, which catch on the lugsaon the molding-table A,and connect it with the table, so as to form part thereof. After thereservoir is removed the platform 1 is swung over and connected with themolding-table, as shown in Fi g. 3, and the bottom board, I), is thenplaced on the mold, and the mold turned over, so as to bring thepattern-plate (J on the top of the mold.

The pattern-plate C is removed from the mold by improved apparatus,which is sup ported by the flask, being either attached to it by clampsor other suitable fastenings or resting directly on the flask. Gillustrates one form of this apparatus, which is attached to the flaskby means of a clamping-bar, g, at one end of the apparatus.

The (pattern-removing apparatus has the upper an lower frames, 11 H,connected by the uprights h, the lower frame fitting around the flask,which passes up through it. Upon each of the uprights h are theguide-sockets i, carrying the guide-plate K within the frame, said platebeing so attached as to be at right angles to the uprights and to liehorizontal when the uprights are perpendicular. The guideplatc, with itsguide-sockets, is capable of vertical movement within the frame, thesockets sliding on the uprights.

In the center of the plate K is formed the opening k, through which theconnecting-lug c on the pattern-plate 0 passes. Mounted on suitablesupports 1, on the upper frame H, is the lifting-wheel L, provided withthe handle l and a chain or cord, m, at the end of which is attached ahook or other suitable connecting device. The wheel L is mounted in suchposition that the chain or cord m hangs directly over the centralopening, 1:, ot' the guide-plate. At one end of the apparatus, below thelower frame, II, is the clampingbar 9, which is advanced and retractedby means of the eccentric pivot-rod 9', so as to be forced against theflask when it is desired to attach the apparatus to it. The clamping-barg is supported in position and guided in its movementby the lugs 9',attached tothe frame.

\Vhen this apparatus is used it is placed over the flask containing thepattern and mold until the guide-plate K rests upon the patternplate 0,and the pin k is passed through a hole in the connecting-lug c, whichextendsup through the central opening, it, thus fastening the two platesfirmly together. The clamping-bar g is then forced against the flask.bythe pivot-rod g, fastening the apparatus rigidly to the flask. Thebook at the end of the chain at is caught in the lug c, and the twoplates are raised vertically by means of the wheel L and handle I, beingguided in their movement by the sockets i on the perpendicular uprightsh.

As the guide-plate K and pattern-plate 0 are parallel and are firmlyconnected, it is evident that the patterns will be drawn from the flaskin a direct line without sagging in any way, and will leave a perfectmold in the SHIN During the operation of withdrawing the pattern theapparatus used is sup orted on, and the pressure or force by wind thepattern is lifted out is sustained by, the flask. The apparatus may beremoved by loosening the clamping-bar, the pattern-plate removedtherefrom, and the molding continued as before described.

In Fig. 5 is shown another form of apparatus for withdrawing thepattern, in which the parts are arranged somewhat difl'erently. Insteadof hanging the guide-plate within the frame, it is placed on top of theflask between the pattern-plate and flask, as shown at K, and isprovided with the guide-sockets i, which project into the flask, andinto and within which guide-rods h on the pattern-plate!) lit and work.The patternscpass thron h openings in the plate K of the shape of he patterns and project into the flask. These guide rods h on thepattern-plate serve to guide the plate when being removed in the sameway as the uprights h in the apparatus heretofore described. Through theplate 0 are three or more openings, r, through which the siiilpports sof the lifting-frame H pass. The ask is placed on the plates 0 and K,and the mold formed, the reservoir removed and the flask turned over, asabove descri 'Ihe liftingframe H is then placed on the plate, thesupports a passing through the openings r in the pattern-plate U, andresting on the stripper or guide plate K, thechain or cord at connectedwith the lug c of the pattern-plate, and the pattern-plate litted by themovement of the wheel L, as above described, the patternplate beingguided in its movement by the guide-rods h in the tubular guide socketsi,

and the patterns a rising through the openings in the guide stripperplate K. In this operation the plate K rests on the flask, and thepressure or force by which the pattern is lifted is sustained by theflask through the plate K. Alter the removal of the plate 0 the plate Kmay be lifted oil in the usual way, the extensions or socketsi guidingit in its movement.

The following are some of the advantages of my improvement: The mold iscut oil evenly when the reservoir is removed, rendering it unnecessaryto fill up and rain or level oil the surface. The apparatus for removingthe pattern is accurate, simple, convenient, and cheap. It can be usedwhether the pattern-plate is perfectly parallel with the under surfaceof the mold or not, as itis only essential that the guideeplate andpattern-plate are arallel, and it always draws the pattern iua irectline at right angles to the pattern-plate itself, thus.

insuring a perfect mold.

It is evident that another mechanism fer withdrawing the plateequivalent to: the wheei and chain may be adopted; also, the

pattern may be used without: the. piate and.

directly connected to th'e'gui 1g; meehanism. \Vhat I clairnas myinvention, and desireto secure by Letters Patent, is-

-1. In combination with the flask and. reset- ,voir, the separating-wireD adapted to be drawn between the flask. and reservoir, substantiall yas and for tire pal-"poses: set forth.

2. In 'apparatusibr withdrawing the patand supported by the flask afterthe formation of the mold, the pattern-plate G, the guideplate K,provided with the guide-sockets i and suitable guides ll, substantiallyas and for the purposes set forth.

4. In combination with the flash, the removable lil'ting-frame, placednpon, supported by,

and provided with a clamp, g, for securing it to the flask after theformation of the mold,

and ihe'horizontal guide-plate K. mounted in thei'rame on theperpendicular uprights I1, and adapted to rest upon and .be so'seeuredto the pattern-plate as to hold it parallel therewith when. thepattern-plate is removed from the. mm id], substantially as and for thepurposes set; forth.

combination with the flask, the removabie lifting-frame placed upon,supported by, and provided with a clamp for securing it to 3 the flaskafter the formation of the mold, the f guide-plate K mounted in saidframe onthe apr v guide-plate to the pattern-plate or pattern,

htsih, suitable'means for attaching the and the lifting-wheel forwithdrawing the pattern, substantially as and for the purposes setforth..

6. The combination of the pattern-plate O,

provided with the log 6, the guideplate K,

pin k, lifting wheel L,and chain or cord at,

' substantially as and for the purposes set forth.

7. In apparatus for withdrawing the patterns from molds, thelifting-frame II H h, provided with the clamping-bar g and pivotrod g,substantially as and for the purposes set forth.

8. I The combination of the reservoir B, provided with the guiding-stripb, reservoir bot-- tom-board E, having the teeth 0, and the flask B,substantially as and for the purposes set forth.

9. The combination of the molding-table A and the hinged swingingplatibrmh, adapted to be eonnected to the table, substantially as andfor the purposes set forth.

In testimony whereof I, the said S. JARVIS ADAMS, have hereunto set myhand;

' S. JARVIS ADAMS;

Witnesses: V

F. G. KAY, Janus I. KAY.

